Ok, stakes level is micro, 10NL. You're the seat before the cutoff with JJ. UTG folds, UTG1 raises, folded around to you, who re-raises. Folds around back to the original raiser who shoves for a comparible stack to yours. For ease of analysis let's say you both start the hand with $10 stacks, MP0 raised to 0.40, you raised to 1.20.
How large does Villian's PFR% have to be to make calling the shove +EV?